package com.sen.gulimall.order.config;

import feign.RequestInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * @author Kisen
 * @email lqs0911@qq.com
 * @date 2022/11/20 10:08
 * @detail feign请求拦截器
 */
@Configuration
public class FeignConfig {

    @Bean
    public RequestInterceptor requestInterceptor() {
        return template -> {
            //1、RequestContextHolder拿到刚进来的这个请求
            ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
            System.out.println("RequestInterceptor线程..." + Thread.currentThread().getId());
            if (attributes != null) {
                HttpServletRequest request = attributes.getRequest(); //老请求
                //同步请求头数据 Cookie
                String cookie = request.getHeader("Cookie");
                //给新请求同步了老请求的cookie
                template.header("Cookie", cookie);
                System.out.println("feign远程之前先进行RequestInterceptor.apply");
            }
        };
    }
}
